Rafael Nadal leaves the court after losing his quarter final match against Austria's Dominic Thiem in Madrid on Friday. Photo:Mariscal/EPA

MADRID – Rafael Nadal suffered his first clay-court defeat in almost a year when the world number one was shocked 7-5, 6-3 by Austria's Dominic Thiem in the Madrid Open quarter-finals on Friday.

Defending champion Nadal, who came into the tournament having won his 11th titles at Monte Carlo and at Barcelona, also saw his record 50-set winning streak on clay ended by the fifth-seeded Thiem.

Thiem had been the last player to defeat Nadal on clay at the Italian Open in Rome almost 12 months ago.

Austria's Dominic Thiem in action during his men's singles quarter-final match against Rafael Nadal of Spain at the Madrid Open. Photo: Kiko Huesca/EPA

The shock result also means that Roger Federer will reclaim the world number one ranking on Monday.